The only model I really fly is the C Training variant..
Well, heck. There goes THAT theory...
Do you try to see the effects higher up or low? As to the AB effects, I haven't a clue. They work fine on mine at all altitudes. But I know you have to be pretty low for the LEX vapor effect to show up. I tested them at 1,000'MSL (over the ocean near Whidbey, to be exact) and they showed up great. I accelerated to about 350KIAS, then turn into a tight bank and PULL. About 5 or 6 G's. I get wingtip trails at any altitude, but the lex vapor needs low altitude and a hard pull, resulting in a pretty high AOA. They start to show up at about 4.5 or 5 G, about 200KIAS or less but a good hard steady pull. I don't know the AOA, being in external view, and during the turn I can't see the HUD anyway, because of the GLOC set-up in FSX. Where you "black out" at certain G. See the first picture below...It's showing the LEX and wing-tip vapor in operation. Not a really high AOA, about 15-20°.
The second shows the contrail, wing-tip vapor, and AB's in operation, up about 30'000' MSL. Kinda a high AOA maneuver
As to why they aren't showing on yours I can't think. You don't change the Panel or the Gauges therein at all? All the gauges are IN the panel folder? They should be from the download file. You don't put all the gauge folders, like the FX folder or anythng, into the FSX\Gauges folder do you? You just leave them in the Panel folder?
Again, trying to think of possibilities.
Hope something jogs a thought loose in my peabrain eventually...
Pat☺